source3/rpc_client/rpc_transport_sock.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC client transport over a socket
   4  *  Copyright (C) Volker Lendecke 2009
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21
  22 #undef DBGC_CLASS
  23 #define DBGC_CLASS DBGC_RPC_CLI
  24
  25 struct rpc_transport_sock_state {
  26         int fd;
  27 };
  28
  29 static int rpc_transport_sock_state_destructor(struct rpc_transport_sock_state *s)
  30 {
  31         if (s->fd != -1) {
  32                 close(s->fd);
  33                 s->fd = -1;
  34         }
  35         return 0;
  36 }
  37
  38 struct rpc_sock_read_state {
  39         ssize_t received;
  40 };
  41
  42 static void rpc_sock_read_done(struct tevent_req *subreq);
  43
  44 static struct async_req *rpc_sock_read_send(TALLOC_CTX *mem_ctx,
  45                                             struct event_context *ev,
  46                                             uint8_t *data, size_t size,
  47                                             void *priv)
  48 {
  49         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
  50                 priv, struct rpc_transport_sock_state);
  51         struct async_req *result;
  52         struct tevent_req *subreq;
  53         struct rpc_sock_read_state *state;
  54
  55         if (!async_req_setup(mem_ctx, &result, &state,
  56                              struct rpc_sock_read_state)) {
  57                 return NULL;
  58         }
  59
  60         subreq = async_recv_send(state, ev, sock_transp->fd, data, size, 0);
  61         if (subreq == NULL) {
  62                 goto fail;
  63         }
  64         subreq->async.fn = rpc_sock_read_done;
  65         subreq->async.private_data = result;
  66         return result;
  67  fail:
  68         TALLOC_FREE(result);
  69         return NULL;
  70 }
  71
  72 static void rpc_sock_read_done(struct tevent_req *subreq)
  73 {
  74         struct async_req *req = talloc_get_type_abort(
  75                 subreq->async.private_data, struct async_req);
  76         struct rpc_sock_read_state *state = talloc_get_type_abort(
  77                 req->private_data, struct rpc_sock_read_state);
  78         int err;
  79
  80         state->received = async_recv_recv(subreq, &err);
  81         if (state->received == -1) {
  82                 async_req_nterror(req, map_nt_error_from_unix(err));
  83                 return;
  84         }
  85         async_req_done(req);
  86 }
  87
  88 static NTSTATUS rpc_sock_read_recv(struct async_req *req, ssize_t *preceived)
  89 {
  90         struct rpc_sock_read_state *state = talloc_get_type_abort(
  91                 req->private_data, struct rpc_sock_read_state);
  92         NTSTATUS status;
  93
  94         if (async_req_is_nterror(req, &status)) {
  95                 return status;
  96         }
  97         *preceived = state->received;
  98         return NT_STATUS_OK;
  99 }
 100
 101 struct rpc_sock_write_state {
 102         ssize_t sent;
 103 };
 104
 105 static void rpc_sock_write_done(struct tevent_req *subreq);
 106
 107 static struct async_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
 108                                              struct event_context *ev,
 109                                              const uint8_t *data, size_t size,
 110                                              void *priv)
 111 {
 112         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
 113                 priv, struct rpc_transport_sock_state);
 114         struct async_req *result;
 115         struct tevent_req *subreq;
 116         struct rpc_sock_write_state *state;
 117
 118         if (!async_req_setup(mem_ctx, &result, &state,
 119                              struct rpc_sock_write_state)) {
 120                 return NULL;
 121         }
 122         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
 123         if (subreq == NULL) {
 124                 goto fail;
 125         }
 126         subreq->async.fn = rpc_sock_write_done;
 127         subreq->async.private_data = result;
 128         return result;
 129  fail:
 130         TALLOC_FREE(result);
 131         return NULL;
 132 }
 133
 134 static void rpc_sock_write_done(struct tevent_req *subreq)
 135 {
 136         struct async_req *req = talloc_get_type_abort(
 137                 subreq->async.private_data, struct async_req);
 138         struct rpc_sock_write_state *state = talloc_get_type_abort(
 139                 req->private_data, struct rpc_sock_write_state);
 140         int err;
 141
 142         state->sent = async_send_recv(subreq, &err);
 143         if (state->sent == -1) {
 144                 async_req_nterror(req, map_nt_error_from_unix(err));
 145                 return;
 146         }
 147         async_req_done(req);
 148 }
 149
 150 static NTSTATUS rpc_sock_write_recv(struct async_req *req, ssize_t *psent)
 151 {
 152         struct rpc_sock_write_state *state = talloc_get_type_abort(
 153                 req->private_data, struct rpc_sock_write_state);
 154         NTSTATUS status;
 155
 156         if (async_req_is_nterror(req, &status)) {
 157                 return status;
 158         }
 159         *psent = state->sent;
 160         return NT_STATUS_OK;
 161 }
 162
 163 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
 164                                  struct rpc_cli_transport **presult)
 165 {
 166         struct rpc_cli_transport *result;
 167         struct rpc_transport_sock_state *state;
 168
 169         result = talloc(mem_ctx, struct rpc_cli_transport);
 170         if (result == NULL) {
 171                 return NT_STATUS_NO_MEMORY;
 172         }
 173         state = talloc(result, struct rpc_transport_sock_state);
 174         if (state == NULL) {
 175                 TALLOC_FREE(result);
 176                 return NT_STATUS_NO_MEMORY;
 177         }
 178         result->priv = state;
 179
 180         state->fd = fd;
 181         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
 182
 183         result->trans_send = NULL;
 184         result->trans_recv = NULL;
 185         result->write_send = rpc_sock_write_send;
 186         result->write_recv = rpc_sock_write_recv;
 187         result->read_send = rpc_sock_read_send;
 188         result->read_recv = rpc_sock_read_recv;
 189
 190         *presult = result;
 191         return NT_STATUS_OK;
 192 }